Just curious as to how many of you balance the weights of your batteries. I've 3 3S batteries all having different weights with about a 60 gram difference between the lightest and heaviest. I've added lead to the light ones to match the heaviest. My thinking is that to maintain a constant CG the weights need to be equal since the batteries don't sit directly under the CG. On my co-ax the batteries do sit in line with the CG so it should not matter.